Navy combat systems are ship class dependent and, until recently, were acquired as stovepipes. The disaggregated stovepipe acquisition method leads to suboptimal designs and exorbitant costs throughout the system’s lifecycle. A product line approach could reduce costs, increase mission effectiveness, and enable more rapid deployment across the Navy and rest of the Department of Defense. Existing software product line cost models are oversimplified to model per-product characteristics and savings within a product line across the lifecycle of a system. Improving these existing cost models will better support decision making for future acquisitions. By applying existing research and leveraging the Constructive Product Line Investment Model, this work estimates product line savings and return on investment for the AEGIS combat system product. The AEGIS common source library is a proven standard for an evolving product line architecture to meet Navy combat systems requirements and has proven cost savings since its inception. This research provides a methodology and cost model framework for product line decisions while extending it for the AEGIS combat system case study.

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